1The main body is made of cemented carbide, which effectively extends the service life. 2This hole saw cutter can make holes in steel plates, iron plates, stainless steel plates, aluminum plates, calcium silicate plates, plastic plates, resin plates, and FRP plates. 3The cutting edge is incisive, the opening is neat and glossy without broken edges, and the cutting resistance is small. 4With front and rear inclination angle tooth shape design, low resistance and strong perforation ability. 5The carbide hole saw can be compatible with a variety of materials and work more efficiently.Item Type: Carbide Hole Cutter Material: Carbide Purpose: To make holes in steel plate, iron plate, stainless steel, aluminum plate, calcium silicate plate, plastic plate, resin plate, FRP plate Plate Cutting Thickness: Approx. 3mm / 0.1in Total Length: Approx. 88mm / 3.5in Inner Wall Thickness: Approx. 20mm / 0.8in Shank Diameter: Approx. 9.8mm / 0.4in Hole Diameter Specification: Approx. 16mm / 0.63in 16.5mm / 0.65in 17mm / 0.67in 17.5mm / 0.69in 18mm / 0.71in 18.5mm / 0.73in 19mm / 0.75in 19.5mm / 0.77in 2 x Hole Saw 2 x Spring 2 x Hex Wrench Not suitable for electric drills and impact drills, as well as materials such as tiles, concrete, wall, and stones.